Hi, I'm planning to have a holiday to China on December. My question is:
1. If i'm leaving on Dec.25th and my passport runs out on May 31st 2010 (planning to stay for 9 days), would that be ok since the min. has to be at least 6 months?

2. I'm going to stay at my friend's house who's working as a teacher at one of the international school in Beijing. Would his address be ok in a replace of a hotel booking?

3. Does the visa valid for all the city in China? Thank you